From what I remember about the original AA587 threads there was a lot of other issues talked around the B744 wake. e.g. strong vortex as the JAL 744 was at max weight, the separation between the two aircraft wasn't the required minimum and the wind direction all added to the vortex being worst case and therefore very strong when it hit the A300.
So it might not be a case of this aircraft is better than this one flying through a 744 wake, but on this particular day under the given conditions and contributing factors, any aircraft would have experienced difficulties.
Can anyone remember what the other contributing factors were on that day??
Cejk